Cartomancer

If they offer to marry anyone then they must be compelled to marry everyone who asks

Even satanists?!

All you're doing is removing the liberty of people to form voluntary groups free from state interference. If a church wants to admit only red-haired, left-handed vegans...what's that got to do with the state?

They do not have the liberty to murder who they want, steal what they want, rape who they want or set what they want on fire.

Of course they don't, since such actions violate the rights of others. What you seem to be suggesting is that groups of people who voluntarily come together should have to acquiesce, faced with the threat of state coercion no less, to the wishes of those outside the group, a blatant infringement of the members' liberty.